Sony STR-DB840 Service Manual page 45

IC501, 601, 701 uPC2581V (MAIN Board)
PROTECTOR
PRE
REG DRIVE
DRIVE
1 2 3 4 5
IC1005 TC74ACT153AF (EL) (DIGITAL Board)
DATA INPUTS
STROBE A
VCC 2C3 2C2 2C1 2C0
2G SELECT
16 15 14 13 12 11
2C3 2C2 2C1 2C0
2G
B B A
B B A
1G
1C3 1C2 1C1 1C0
1 2 3 4 5 6
STROBE B 1C3 1C2 1C1 1C0
1G SELECT
DATA INPUTS
BIAS CIRCUIT
PRE
DRIVE
DRIVE
6 7 8 9 10 11 12
OUTPUT
2Y
9
10
2Y
A
A
1Y
7
8
OUTPUT GND
1Y
14 15
13
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